Grinding wheel



P. BUCHEISTER GRINDING WHEEL July 26, 1932.

Filed March 28. 1929 Patented July 26, 1932 UNITED" STATES PAUL BUGHEISTER, OF TIFFIN, OHIO, ASSIGNOR TO THE STERLING GRINDING. WHEEL h COMPANY, OF TIFFIN, OHIO, A CORPORATION OF OHIO GRINDING WHEEL Application filed March 28, 1929.

. which the latter type of grinding wheel posless breakage than solid wheels; and the more i efficient operation of segmental grindlng wheels because of thereduced tendency for wheels of this type to become glazed. How ever, when such a change is to be made it is frequently found that the mount or chuck for" holding the grinding wheel has been speclally designed for holding a solid wheel and is grinding wheel.

not suitable for holding a segmental grind ing wheel. In such cases it is necessary to replace the mount, furnished with the machine, with a mount which is suitable for holding grlndmg segments to form a segmental grinding wheel. This substitution of a new mount for the one furnished with the machine represents an additional expense, which I have found canbe avoided by adapting the mount furnished with the machine so that it may be used for holding a segmental It is an object of this invention to provide an arrangement by which a mount designed for holding a solid grinding wheel may be adapted to hold a segmental grinding wheel. Another object of this invention is to provide an improved form of grinding wheel.

The inventionmay be further briefly summarized as consisting in certain novel combinations and arrangements of parts hereinafter described and set out in the appended claim.

In the accompanying sheet of drawing forming a part of this application,

Fig. 1 is a perspective view showing a grinding wheel embodying my invention.

Fig. 2 is a transverse sectional view of the grinding wheel shown in Fig. 1.

Serial No. 350,565.

Fig. 3 is a perspective view illustrating another form of grinding wheel embodying my invention.

Fig. 4 is a detailed view showing the form of the segments and spacers.

Referring now to the drawing for a detailed description of the grinding wheels of my invention, I show in Figs. 1 and 2 a segmental grinding wheel formed by a series of grinding sections or segments 10 arranged and held in a chuck or mount which is designated generally by the reference character 11. This chuck or mount may be a part of the regular equipment usually furnished with a grinding machine, and, as shown, comprises a face plate 12 having a shoulder 13 against which a wheel ring let is secured in any convenient manner such as by screws 15. The face plate is mounted upon an arbor 16, and may be provided with passages 17 for supplying water to the grinding wheel. The wheel ring 14 is provided with an axially extending flange 18 which is preferably undercut, as clearly shown in Fig. 2 and indicated by the reference character 19.

The grinding sections or segments 10 are arranged end to end adjacent the axially extending flange 18 to form a grinding wheel which is substantially concentric with this flange. For adjusting the segments to proper position, so that the circular grinding wheel which they form will be properly centered with respect to the axis of rotation of the mount, I prefer to use a tapered spring steel gauge or centering ring which is placed around the outer face of the segments with the tapered portion extending into the channel of the mount between the flange 18 and the segments. In this instance the grinding segments are shown as being formed with a recess or depression in one end and an extension at the opposite end. lVhen the grinding segments are assembled to form the grinding wheel they are arranged with their end portions in interfitting engagement, that is, with the extension of one segment extending into the depression formed in the adjacent segment. I have found that a joint of this kind between the segments makes a stronger and more durable grinding wheel.

For retaining the segments in the mount, I 7

provide a retaining ring" 20, which is of smaller diameter than the fiange 18, and has a tapered peripheral face, as indicated at21,

' and is secured to the wheel ring 14 in concentric relation with this flange. T0 facilitate the mounting and removal of the segments, I have made the retainingring detachable by securing it to the wheel ring by means ofscrews 22'. The axially extending flange 18 and the retaining-ring 20 are of substantially equal height, and in the channel formed between these concentricmembers the grinding segments are arranged and securely held in place by cement, such as sulphur, indicated at 23 which fills the space between the segments and the inclined walls of the channel. The grinding segments are relativelyhigh in comparison with-the height of the flange 18 and the retaining ring 20,- and when mounted in this manner they will be securely 'held in place for'continuous grinding service until they are worn down to a height substantially equal to the'height oi the flange and retaining ring. 'lVhen the segments are thus worn down they can be quickly and easily removed andreplaced by removing the wheel ring and the detachable retaining ring.

cording to. my invention.

' In Fig. 3 of the drawingl have shown another form of grinding'wheel constructed ac- In this form of wheel, which is commonly referred tons a staggered grindlng wheel, one of the grlnding sections or segments of the arrangement shown in Fig. 1 is omitted and the remaining segments 10 are arranged spaced relation with substantially equal spaces between their end portions. For holding the segments in this spaced relation I provide spacers 2 5, which are relatively low in height incomparison with the height of the grindingsegments. In this arrangement the spacers, 25

andthe segments 10 are arranged alternately in a series in the channel formed between the wheel ring flange 18 and'the detachable retaining ring 20, with the end portions'of adjacent members in interfitting engagement, and with the spacers occupying a total space which is approximately equal tether space left by the omission ofa segment. The spacers and segments are properly centered with respect to the axis of rotation'oif the mount by means of a centering ring and are secure sly held in this positi'on'by cement, such as sulphunwhic'h fills the space between the spacers V and segments and the inclined walls oi the channel. I I,

Thesize of these spacers is such that when they are assembled between adjacent segments their height will be approximately equal to the depth of the channel formed between the retaining ring 20 and the axially extending flange 18. .The spacers .are c0n-' structed, as clearly showninFig. 4,;with an interfitting relation with the depressions and extensions of the end portions of adjacent segments; This arrangement of segments grinding wheel, and, furthermore, with the spacers thus arranged between those parts of the segmentswhich lie within the channel 7 in. which 7 the segments are mounted, they 7 require no adjustment, and'do not interfere with the efiicjient operation of the grinding segments at any time during their useful life.

t will now be readily'seen thatl have provided an arrangement by which sections or segments can be quickly easily secured in, a mount to form an efficient grinding wheel, and when worn down can be eas: ily and quickly removed and replaced by new sections or segments.

It is apparent that the particular form which I have shown and describedv tor the end portions of the segments andspacers is not essential to the usefulness of my invention sincexspacers and segments of various shapes may be used. H

, It will be understood,.of course, that I do not limit my invention to the precise details arrangements shown and described,,but regard my nvention as lncludlng such changes and modifications as do not involve a departure from the spirit of my invention and the scope of the appended claim.

l-laving thus described my inventioinl claim: c 7

A sectional grinding wheel comprising a 'mount-having alchannel therein, a series of grinding sections in said'jchannel'each being formed with an extension at one end and a recess at theopposite end, and spacers between adjacent sections of said series, each of said spacers being approximately equal in height 'to the depth of said channel and having arecess atone end andan extension at the opposite end for-interlitting engagement, respectively, with the extension and recess of the. end portions otadjacent sections.

In testimonyrwhereof, lhereunto afiix my signature. v I

' PAUL BUCHEISTER.

and spacers provides an emci'ent and durable 

